This work deals with the preparation of a new tetradentate ligand [ H 2 L] of the N 2 O 2 type, N{2[3(1-carboxyiminoethyl)-1-phenyl]butilydene-2-amino propionic acid}, and its metal complexes with Cr(III), Fe(III), Cu(II) and Zn(II) and fully characterized by H 1 NMR, C 13 NMR, FT-IR, UV-Vis, CHN elemental analysis, magnetic moment and molar conductance in DMF solutions. Based on the experimental results obtained, octahedral geometries of Cr(III) and Fe(III) have been suggested, while Cu(II) and Zn(II) had square planar and tetrahedral symmetries, respectively. The effect of this new metal complex on the photo degradation of poly(vinyl chloride) PVC films blended with a concentration range of 2-2.5% by weight of this new complex was investigated. The changes in the average molecular weight of PVC with irradiation time were tracked to determine the order of activities of each metal complex toward the photodegradation of PVC, andthe photodegradation of PVC films was determined by measuring carbonyl, hydroxyl and polyene indices. The results showed that Cr(III) and Fe(III) complexes increase the rate of CC cleavage and behave as UV photo degradation substances, while the Zn(II) complex behaves as a UV stabilizer.

The present paper deals with the synthesis of cobalt(II), nickel(II), copper(II) and cadmium(II) complexes with two bidentate ligands, L1 (3-(quinoxaline-2-yl)-coumarin) and L2 (2-methylene-2H-chromene-3-(methyl carbonimidic)thioanhydride). The L1 ligand was prepared by treating w-bromo-3-acetylcoumarin with 1,2-phenylenediamine whereas the ligand L2 was prepared through substitution reaction ofw-bromo-3-acetylcoumarin with potassium thiocyanate in ethanol medium. The confirmation of the structures for L1 and L2 were done by (C.H.N.S.) elemental analysis, FT-IR, NMR and mass spectra. The metal complexes of cobalt(II), nickel(II), copper(II) and cadmium(II), with L1 and L2, were prepared and isolated in the solid state then characterized by (C.H.N.M) elemental analysis, proton and carbon-13 NMR, FT-IR and mass spectra. Furthermore, the thermal analysis (TG-DSC) for some complexes assisted us in the elucidation of the suggested structures of complexes and confirmed their thermal stability. The results obtained from elemental analysis, magnetic susceptibility and thermal analysis confirmed that all metal complexes were formed in 2:1 molar ratio of ligand to metal with octahedral structures except cadmium(II) complexes which were in a tetrahedron geometry with 1:1 mole ratio. The complexes are found to be soluble in DMF and DMSO. The results obtained from TG-DSC analysis revealed that the metal complexes were thermally stable with point decomposition over 350 °C. The DFT/TDDFT calculations were carried out to provide the electronic structures and spectra of the compounds.

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A new chelating copolymer (8HQ-pvc) was prepared through condensation reaction of 8-hydroxyquinoline-5-sulphonic acid with poly (vinyl chloride) in the presence of pyridine as catalyst. This newly developed resin (8-HQ-pvc) has been used to prepare a series of six polymeric chelates by using Cr(III), Co(II), Ni(II),Cu(II), Cd (II) , Hg(II) and Pb(II) ions. Both the parent chelating resin and its metal chelates have been systematically investigated in detail to elucidate the chemical structure by micro elemental analysis and spectral methods(IR, 1 H-13 C NMR, and Uv-Vis) spectra, as well as the isometric studies to deduce the average molecular weights of repeated unit in polymeric metal complexes.. In addition to these magnetic susceptibility measurements of the solid metal complexes of PVC-8HQ and the molar conductance of thier solutions in DMSO solutions have been measured to investigate the stereo chemical structures. The chemical structure of metal chelates on the basis of elemental and IR data suggests that the bi dentate (8HQ-pvc) resin coordinate to metal ions through oxygen atom of SO3-H group by replacing H atom and nitrogen of the quinolone ring. Ion exchange properties of the newly resin were studied for Cr 3+ , Co 2+ , Ni 2+ , Cu 2+ , Pb 2+ and Hg 2+ ions in aqueous solutions. Batch equilibrium method was employed over wide PH range and interval times and showed that PVC-8HQ resin showed a higher selectivity toward Cr 3+ , Cu 2+ and Cd 2+ ions.